I've never seen a lift that didn't sell for a decent price. I bought my last drive on for $2000 and didn't bat an eye. A 16 foot trailer moved it around 30 miles and I moved it another 20 when I moved my business. Raise it up, move the trailer under it, set it down, unbolt the electrical and poles and roll. 2 poles are a bit more work. There are people wanting these and as long as it's above ground, it'll sell.
One auction I went to, they were selling for retail (idiots... pay new for NEW) Another, they were cheaper, but FAR above scrap.
If it will lift a car, $1000 and up for cheap 2 posts. $2000 and up for 4 posts. Add $2-500 for each decent rolling jack on a 4 poster. Add a good chunk more to these figures for nice looking Bendpak, Rotary, and such.